35 lines
886 B
TypeScript
35 lines
886 B
TypeScript
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// Copyright 2021 Signal Messenger, LLC
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// SPDX-License-Identifier: AGPL-3.0-only
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import { LinkPreviewType } from '../types/message/LinkPreviews';
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import { isImageAttachment } from '../types/Attachment';
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const MINIMUM_FULL_SIZE_DIMENSION = 200;
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export function shouldUseFullSizeLinkPreviewImage({
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isStickerPack,
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image,
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}: Readonly<LinkPreviewType>): boolean {
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if (isStickerPack || !isImageAttachment(image)) {
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return false;
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}
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const { width, height } = image;
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return (
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isDimensionFullSize(width) &&
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isDimensionFullSize(height) &&
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!isRoughlySquare(width, height)
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);
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}
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function isDimensionFullSize(dimension: unknown): dimension is number {
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return (
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typeof dimension === 'number' && dimension >= MINIMUM_FULL_SIZE_DIMENSION
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);
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}
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function isRoughlySquare(width: number, height: number): boolean {
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return Math.abs(1 - width / height) < 0.05;
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}
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